Document Detail

Effects of diet type and enzyme addition on growth performance and gut health of broiler chickens during subclinical Clostridium perfringens challenge.
MedLine Citation:
PMID:  19096067     Owner:  NLM     Status:  MEDLINE    
The effects of diet type (corn- vs. wheat-based) and multicarbohydrase addition on growth performance, digesta pH and viscosity, intestinal populations of Clostridium perfringens and lactic acid bacteria, and gut lesion score (from 0 to 4, where 0 = no gross lesions, 4 = severe extensive necrosis) of broiler chickens during oral challenge with C. perfringens (none or 10(8) cfu/bird on d 13) were studied in a 39-d experiment. A total of 1,216 male Ross-308 chickens was assigned to 8 dietary treatments in a randomized complete block design providing 8 replicate pens per treatment. Diets were formulated to meet the NRC protein requirement but were suboptimal in energy level. When compared with birds fed corn-based diets, chickens fed wheat-based diets had inferior (P < 0.01) final BW (2.49 vs. 2.59 kg) and feed conversion ratio (FCR; 1.83 vs. 1.78). Pathogen challenge significantly (P < 0.05) impaired growth performance and increased C. perfringens numbers and average lesion score. Increased (P < 0.01) C. perfringens counts (2.4 vs. 1.5 log(10) cfu/g of digesta) and intestinal lesion score (0.9 vs. 0.4) were observed for challenged birds fed wheat-based diets. No difference in digesta pH and lactic acid bacteria numbers were found among the treatments. Enzyme addition to both the corn- and wheat-based diets increased bird final BW (2.57 vs. 2.51 kg; P < 0.01), decreased overall FCR (1.78 vs. 1.83; P < 0.01), and, in those consuming wheat-based diets, reduced digesta viscosity (from 4.1 to 2.7 mPa.s; P < 0.01). Enzyme supplementation assisted the challenged birds in maintaining their optimal growth performance by improving (P < 0.05) average daily gain (59.5 vs. 56.9 g) in those consuming corn-based diets and FCR (1.83 vs. 1.90) in those consuming wheat-based diets to values similar to those observed in control birds (59.7 g/d and 1.84, respectively). In conclusion, enzyme addition improved growth performance and mitigated the negative effects of C. perfringens challenge.
W Jia; B A Slominski; H L Bruce; G Blank; G Crow; O Jones
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Poultry science     Volume:  88     ISSN:  0032-5791     ISO Abbreviation:  Poult. Sci.     Publication Date:  2009 Jan 
Date Detail:
Created Date:  2008-12-19     Completed Date:  2009-03-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401150     Medline TA:  Poult Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  132-40     Citation Subset:  IM    
Department of Animal Science, University of Manitoba, Winnipeg, Canada R3T 2N2.
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MeSH Terms
Animal Feed / analysis
Animal Nutritional Physiological Phenomena
Chickens* / growth & development
Clostridium Infections / microbiology,  veterinary*
Clostridium perfringens*
Diet / veterinary*
Dietary Supplements
Gastrointestinal Contents
Gastrointestinal Diseases / microbiology,  mortality,  pathology,  veterinary*
Gastrointestinal Tract / microbiology,  pathology
Glycoside Hydrolases / metabolism*
Poultry Diseases / drug therapy,  microbiology,  mortality,  pathology
Reg. No./Substance:
EC 3.2.1.-/Glycoside Hydrolases

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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